From The Perry Mason TV Show Book
Lucas Tolliver has come to California from Oklahoma to meet the woman he was matched up with by a computer dating service. Lucas is pretending to be a poor country hick, but he really owns a great deal of property, including some oil wells. The rich widow he’s matched up with agrees to marry him and the jubilant bridegroom asks his friend Terrence Clay for the name of a good lawyer.
Clay suggests Mason and Lucas asks him to draw up a will for his future bride, Millie Barton. Perry is suspicious of Lucas and has Paul check him out. It turns out that Lucas was married before and his previous wife died from eating poisonous wild greens and left him her fortune. It looks as though Lucas is setting up Millie, especially after she dies at a party after drinking poisoned lemonade that Lucas served her.